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基于虚拟振荡器的大功率储能变流器有源阻尼控制

Active Damping Control of High Power Energy Storage Converter Based on Virtual Oscillators

  • 摘要: 传统有源阻尼控制方法多基于固定参数调节实现,对复杂工况适应性较差,难以有效抑制变流器谐振,因此提出基于虚拟振荡器的大功率储能变流器有源阻尼控制方法。首先建立大功率储能变流器数学模型,描述其动态特性;基于虚拟振荡器原理,设计变流器参数自适应调节机制,使变流器能实时响应工况变化;构建大功率储能变流器有源阻尼控制策略,利用虚拟振荡器动态调节大功率储能变流器特性抑制谐振。实验结果表明,在所有测试工况下,变流器的总谐波畸变率THD均低于2%,满足标准要求的小于5%,且该方法相较于传统方法,六时段谐振峰值平均衰减达到了18.3 dB,谐振峰值波动仅为±0.9 dB,在谐振抑制方面具有显著优势。

     

    Abstract: Traditional active damping control methods are mostly based on fixed parameter adjustment, which has poor adaptability to complex working conditions and is difficult to effectively suppress inverter resonance. Therefore, the study proposes an active damping control method for high-power energy storage inverters based on virtual oscillators. Firstly, establish a mathematical model for high-power energy storage inverters and describe their dynamic characteristics; based on the principle of virtual oscillator, design an adaptive adjustment mechanism for inverter parameters to enable the inverter to respond in real-time to changes in operating conditions; constructing an active damping control strategy for high-power energy storage converters, utilizing virtual oscillators to dynamically adjust the characteristics of the high-power energy storage converters and suppress resonance. The experimental results show that the total harmonic distortion (THD) of the inverter is less than 2% under all test conditions, meeting the standard requirement of <5%. Compared with traditional methods, this method has an average attenuation of 18.3 dB in the six period resonance peak, and the resonance peak fluctuation is only ±0.9 dB, which has significant advantages in resonance suppression.

     

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